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https://www.readbyqxmd.com/read/29040221/thermoeffector-responses-at-a-fixed-rate-of-heat-production-in-heart-failure-patients
#1
Bryce N Balmain, Ollie Jay, Norman R Morris, Kenji Shiino, Glenn M Stewart, Rohan Jayasinghe, Jonathan Chan, Surendran Sabapathy
PURPOSE: Heart failure (HF) patients appear to exhibit altered thermoregulatory responses during exercise in the heat. However, the extent to which these responses are altered due to physiological impairments independently of biophysical factors associated with differences in metabolic heat production (Hprod), evaporative heat balance requirements (Ereq) and/or body size, is presently unclear. Therefore, we examined thermoregulatory responses in 10 HF and 10 age-matched controls (CON) similar in body size during exercise at a fixed rate of Hprod, and therefore Ereq in a 30°C environment...
October 16, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/29030372/dose-dependent-effects-of-the-myosin-activator-omecamtiv-mecarbil-on-cross-bridge-behavior-and-force-generation-in-failing-human-myocardium
#2
Ranganath Mamidi, Jiayang Li, Kenneth S Gresham, Sujeet Verma, Chang Yoon Doh, Amy Li, Sean Lal, Cristobal G Dos Remedios, Julian E Stelzer
BACKGROUND: Omecamtiv mecarbil (OM) enhances systolic function in vivo by directly binding the myosin cross-bridges (XBs) in the sarcomere. However, the mechanistic details governing OM-induced modulation of XB behavior in failing human myocardium are unclear. METHODS AND RESULTS: The effects of OM on steady state and dynamic XB behavior were measured in chemically skinned myocardial preparations isolated from human donor and heart failure (HF) left ventricle. HF myocardium exhibited impaired contractile function as evidenced by reduced maximal force, magnitude of XB recruitment (Pdf), and a slowed rate of XB detachment (krel) at submaximal Ca(2+) activations...
October 2017: Circulation. Heart Failure
https://www.readbyqxmd.com/read/28991250/assessment-of-trec-krec-and-telomere-length-in-long-term-survivors-after-allogeneic-hsct-the-role-of-gvhd-and-graft-source-and-evidence-for-telomere-homeostasis-in-young-recipients
#3
A Gaballa, A Norberg, A Stikvoort, J Mattsson, B Sundberg, M Uzunel, M Remberger, M Uhlin
Reconstitution of the adaptive immune system following allogeneic hematopoietic stem cell transplantation is crucial for beneficial outcome and is affected by several factors, such as GvHD and graft source. The impact of these factors on immune reconstitution has been thoroughly investigated during the early phase after transplantation. However, little is known about their long-term effect. Similarly, leukocyte telomere length (TL) shortening has been reported shortly after transplantation. Nevertheless, whether TL shortening continues in long-term aspect is still unsettled...
October 9, 2017: Bone Marrow Transplantation
https://www.readbyqxmd.com/read/28986328/bridging-the-gap-incorporating-a-semantic-similarity-measure-for-effectively-mapping-pubmed-queries-to-documents
#4
Sun Kim, Nicolas Fiorini, W John Wilbur, Zhiyong Lu
The main approach of traditional information retrieval (IR) is to examine how many words from a query appear in a document. A drawback of this approach, however, is that it may fail to detect relevant documents where no or only few words from a query are found. The semantic analysis methods such as LSA (latent semantic analysis) and LDA (latent Dirichlet allocation) have been proposed to address the issue, but their performance is not superior compared to common IR approaches. Here we present a query-document similarity measure motivated by the Word Mover's Distance...
October 3, 2017: Journal of Biomedical Informatics
https://www.readbyqxmd.com/read/28977313/newborn-screening-for-severe-combined-immunodeficiencies-using-trecs-and-krecs-second-pilot-study-in-brazil
#5
Marilia Pyles P Kanegae, Lucila Akune Barreiros, Jusley Lira Sousa, Marco Antônio S Brito, Edgar Borges de Oliveira, Lara Pereira Soares, Juliana Themudo L Mazzucchelli, Débora Quiorato Fernandes, Sonia Marchezi Hadachi, Silvia Maia Holanda, Flavia Alice T M Guimarães, Maura Aparecida P V V Boacnin, Marley Aparecida L Pereira, Joaquina Maria C Bueno, Anete Sevciovic Grumach, Regina Sumiko W Di Gesu, Amélia Miyashiro N Dos Santos, Newton Bellesi, Beatriz T Costa-Carvalho, Antonio Condino-Neto
OBJECTIVE: To validate the quantification of T-cell receptor excision circles (TRECs) and kappa-deleting recombination excision circles (KRECs) by real-time polymerase chain reaction (qRT-PCR) for newborn screening of primary immunodeficiencies with defects in T and/or B cells in Brazil. METHODS: Blood samples from newborns and controls were collected on filter paper. DNA was extracted and TRECs, and KRECs were quantified by a duplex real-time PCR. The cutoff values were determined by receiver operating characteristic curve analysis using SPSS software (IBM®, Armonk, NY, USA)...
January 2017: Revista Paulista de Pediatria: Orgão Oficial da Sociedade de Pediatria de São Paulo
https://www.readbyqxmd.com/read/28976263/physiological-and-perceptual-strain-of-firefighters-during-graded-exercise-to-exhaustion-at-40-%C3%A2-c-and-10-%C3%A2-c
#6
Erna von Heimburg, Mariann Sandsund, Tone Pedersen Rangul, Randi Eidsmo Reinertsen
PURPOSE: To study whether perceptual identification should be included as a measure to evaluate physiological stress. METHODS: Physiological variables; oxygen uptake (VO2), ventilation, heart rate (HR), blood lactate concentration, rectal temperature (Trec) and mean skin temperature (Tskin), perceptual variables; rate of perceived exertion (RPE), thermal sensation (TS) and time to exhaustion were measured at submaximal and maximal intensities during graded exercise on a treadmill to exhaustion in 12 firefighters wearing protective clothing and extra mass at 40 °C and 10 °C...
October 4, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/28976005/a-comparison-of-trecs-and-flow-cytometry-for-na%C3%A3-ve-t-cell-quantification
#7
Stuart P Adams, Susanne Kricke, Elizabeth Ralph, Nathaniel Gilmour, Kimberly C Gilmour
Assessment of thymic output by measurement of naïve T cells is routinely carried out in clinical diagnostic laboratories, predominantly using flow cytometry with a suitable panel of antibodies. Naïve T cell measurements can also be made using molecular analyses to quantify TRECs (T cell receptor excision circle) levels in sorted cells from the peripheral blood. In this study we have retrospectively compared TRECs levels with CD45RA+CD27+ T cells and also with CD45RA+CD31+ T cells in 134 patient samples at diagnosis or during follow up...
October 4, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28931895/defective-thymic-output-in-was-patients-is-associated-with-abnormal-actin-organization
#8
Wenyan Li, Xiaoyu Sun, Jinzhi Wang, Qin Zhao, Rongxin Dai, Yanping Wang, Lina Zhou, Lisa Westerberg, Yuan Ding, Xiaodong Zhao, Chaohong Liu
Wiskott-Aldrich syndrome protein (WASp) is a key regulator of the actin cytoskeleton. Defective T - cell function is a major cause for immune deficiency in Wiskott-Aldrich syndrome (WAS) patients. T cells originate in the bone marrow and develop in the thymus, and then migrate to peripheral tissues. TCR excision circles (TRECs) present in thymic output cells stably, which is used as a molecular marker for thymic output. We found that CD8(+) T naïve cells of classic WAS patients were significantly reduced, and TRECs in patients with classic WAS and X-linked thrombocytopenia (XLT) dramatically decreased compared with that of HCs...
September 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28918671/long-term-outcomes-of-severe-combined-immunodeficiency-therapy-implications
#9
Jennifer Heimall, Morton J Cowan
Newborn screening has led to a better understanding of the prevalence of Severe Combined Immunodeficiency (SCID) overall and in terms of specific genotypes. Survival has improved following hematopoietic stem cell transplantation (HCT) with the best outcomes seen following use of a matched sibling donor. However, questions remain regarding the optimal alternative donor source, appropriate use of conditioning and the impact of these decisions on immune reconstitution and other late morbidities. Areas covered: The currently available literature reporting late effects after HCT for SCID and use of alternative therapies including enzyme replacement, alternative donors and gene therapy are reviewed...
November 2017: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/28910364/surge-of-immune-cell-formation-at-birth-differs-by-mode-of-delivery-and-infant-characteristics-a-population-based-cohort-study
#10
Titus Schlinzig, Stefan Johansson, Olof Stephansson, Lennart Hammarström, Rolf H Zetterström, Ulrika von Döbeln, Sven Cnattingius, Mikael Norman
BACKGROUND: Birth by cesarean section is associated with increased risks of immune disorders. We tested whether establishment of immune function at birth relates to mode of delivery, taking other maternal and infant characteristics into account. METHODS AND FINDINGS: Using a prospectively collected database, we retrieved information on maternal and infant characteristics of 6,014 singleton infants delivered from February to April 2014 in Stockholm, Sweden, with gestational age ≥35 weeks, Apgar scores ≥7, and without congenital malformations or any neonatal morbidity...
2017: PloS One
https://www.readbyqxmd.com/read/28861919/newborn-screening-for-severe-combined-immunodeficiency-evaluation-of-a-commercial-t-cell-receptor-excision-circle-based-method-in-victorian-dried-blood-spots
#11
Stephanie Richards, James Pitt, Sharon Choo
AIM: Severe combined immunodeficiency (SCID) is the most severe form of primary immunodeficiency and is fatal in infancy if untreated. As early diagnosis is associated with improved outcomes, SCID is an ideal condition to consider for inclusion in a newborn screening (NBS) programme in Australia. In this feasibility study, we evaluated the EnLite Neonatal TREC kit for detection of T-cell receptor excision circles (TRECs) from NBS dried blood spots for the identification of known SCID patients in Victoria...
September 1, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/28826609/a-droplet-digital-pcr-method-for-severe-combined-immunodeficiency-newborn-screening
#12
Noemi Vidal-Folch, Dragana Milosevic, Ramanath Majumdar, Dimitar Gavrilov, Dietrich Matern, Kimiyo Raymond, Piero Rinaldo, Silvia Tortorelli, Roshini S Abraham, Devin Oglesbee
Severe combined immunodeficiency (SCID) benefits from early intervention via hematopoietic cell transplantation to reverse T-cell lymphopenia (TCL). Newborn screening (NBS) programs use T-cell receptor excision circle (TREC) levels to detect SCID. Real-time quantitative PCR is often performed to quantify TRECs in dried blood spots (DBSs) for NBS. Yet, real-time quantitative PCR has inefficiencies necessitating normalization, repeat analyses, or standard curves. To address these issues, we developed a multiplex, droplet digital PCR (ddPCR) method for measuring absolute TREC amounts in one DBS punch...
September 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/28814173/early-diagnosis-of-severe-combined-immunodeficiency-scid-in-turkey-a-pilot-study
#13
Ceren Can, Şahin Hamilçıkan, Emrah Can
OBJECTIVE: Severe combined immunodeficiency (SCID) is a neonatal emergency. As the T cell receptor excision circles (TREC) test is not cost effective for neonatal screening of SCID in developing countries, this pilot study's objective aimed at identifying preliminary data to enable SCID identification in the general population. METHODS: This observational study was performed in Bagcılar Training and Research Hospital, Istanbul, Turkey. Cord-blood complete blood count (CBC) was recorded in all neonates included in the study...
August 17, 2017: Journal of Maternal-fetal & Neonatal Medicine
https://www.readbyqxmd.com/read/28812867/ultrasensitive-silicon-nanowire-sensor-developed-by-a-special-ag-modification-process-for-rapid-nh3-detection
#14
Yuxiang Qin, Diao Liu, Tianyi Zhang, Zhen Cui
Surface functionalization is very effective in enhancing sensing properties of a chemiresistive gas sensor. In this work, we develop a novel and cost-effective process to prepare Ag-modified silicon nanowire (SiNW) sensors and further suggest a resistance effect model to clarify the enhanced sensing mechanism of Ag-modified SiNWs. The SiNWs were formed via metal-assisted chemical etching (MACE), and the Ag nanoparticle (NP) modification was achieved in situ based on the MACE-produced Ag dendrites by involving a crucial anisotropic postetching of TMAH...
August 30, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28807883/simultaneous-afm-topography-and-recognition-imaging-at-the-plasma-membrane-of-mammalian-cells
#15
REVIEW
Lilia A Chtcheglova, Peter Hinterdorfer
Elucidation the nano-organization of membrane proteins at/within the plasma membrane is probably the most demanding and still challenging task in cell biology since requires experimental approaches with nanoscale resolution. During last decade, atomic force microscopy (AFM)-based simultaneous topography and recognition imaging (TREC) has become a powerful tool to quickly obtain local receptor nano-maps on complex heterogeneous biosurfaces such as cells and membranes. Here we emphasize the TREC technique and explain how to unravel the nano-landscape of mammalian cells...
August 11, 2017: Seminars in Cell & Developmental Biology
https://www.readbyqxmd.com/read/28791007/prospective-study-of-a-cohort-of-russian-nijmegen-breakage-syndrome-patients-demonstrating-predictive-value-of-low-kappa-deleting-recombination-excision-circle-krec-numbers-and-beneficial-effect-of-hematopoietic-stem-cell-transplantation-hsct
#16
Elena Deripapa, Dmitry Balashov, Yulia Rodina, Alexandra Laberko, Natalya Myakova, Nataliia V Davydova, Maria A Gordukova, Dmitrii S Abramov, Galina V Pay, Larisa Shelikhova, Andrey P Prodeus, Mikhail A Maschan, Alexey A Maschan, Anna Shcherbina
BACKGROUND: Nijmegen breakage syndrome (NBS) is a combined primary immunodeficiency with DNA repair defect, microcephaly, and other phenotypical features. It predominantly occurs in Slavic populations that have a high frequency of carriers with the causative NBN gene c.657_661del5 mutation. Due to the rarity of the disease in the rest of the world, studies of NBS patients are few. Here, we report a prospective study of a cohort of Russian NBS patients. METHODS: 35 Russian NBS patients of ages 1-19 years, referred to our Center between years 2012 and 2016, were prospectively studied...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28758054/instance-search-retrospective-with-focus-on-trecvid
#17
George Awad, Wessel Kraaij, Paul Over, Shin'ichi Satoh
This paper presents an overview of the Video Instance Search benchmark which was run over a period of 6 years (2010-2015) as part of the TREC Video Retrieval (TRECVID) workshop series. The main contributions of the paper include i) an examination of the evolving design of the evaluation framework and its components (system tasks, data, measures); ii) an analysis of the influence of topic characteristics (such as rigid/non rigid, planar/non-planar, stationary/mobile on performance; iii) a high-level overview of results and best-performing approaches...
March 2017: International Journal of Multimedia Information Retrieval
https://www.readbyqxmd.com/read/28758046/medical-question-answering-for-clinical-decision-support
#18
Travis R Goodwin, Sanda M Harabagiu
The goal of modern Clinical Decision Support (CDS) systems is to provide physicians with information relevant to their management of patient care. When faced with a medical case, a physician asks questions about the diagnosis, the tests, or treatments that should be administered. Recently, the TREC-CDS track has addressed this challenge by evaluating results of retrieving relevant scientific articles where the answers of medical questions in support of CDS can be found. Although retrieving relevant medical articles instead of identifying the answers was believed to be an easier task, state-of-the-art results are not yet sufficiently promising...
October 2016: Proceedings of the ... ACM International Conference on Information & Knowledge Management
https://www.readbyqxmd.com/read/28747600/severe-combined-immunodeficiency-from-its-discovery-to-the-perspective
#19
REVIEW
Hirokazu Kanegane, Kohsuke Imai, Tomohiro Morio
  Severe combined immunodeficiency (SCID) is impaired in lymphocyte development and function. Affected children have extreme susceptibility to infections, which are fatal in the first year of life without treatment. The estimate of incidence is one in approximately 50,000 live birth. The first series of diseases were described in 1950s, and all patients died in infancy. The first transplant for SCID was carried out in 1968, and it has been described that SCID patients could be treated by hematopoietic stem cell transplantation (HSCT) since then...
2017: Nihon Rinshō Men'eki Gakkai Kaishi, Japanese Journal of Clinical Immunology
https://www.readbyqxmd.com/read/28723581/the-structure-and-function-of-cell-membranes-studied-by-atomic-force-microscopy
#20
REVIEW
Yan Shi, Mingjun Cai, Lulu Zhou, Hongda Wang
The cell membrane, involved in almost all communications of cells and surrounding matrix, is one of the most complicated components of cells. Lack of suitable methods for the detection of cell membranes in vivo has sparked debates on the biochemical composition and structure of cell membranes over half a century. The development of single molecule techniques, such as AFM, SMFS, and TREC, provides a versatile platform for imaging and manipulating cell membranes in biological relevant environments. Here, we discuss the latest developments in AFM and the progress made in cell membrane research...
July 16, 2017: Seminars in Cell & Developmental Biology
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